1120321520 has 80 divisors (see below), whose sum is σ = 2685953088. Its totient is φ = 434257920.

The previous prime is 1120321519. The next prime is 1120321537. The reversal of 1120321520 is 251230211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1120321520² = 2510240616350220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919952 + ... + 921168.

Almost surely, 2^1120321520 is an apocalyptic number.

1120321520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1120321520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342976544).

1120321520 is an abundant number, since it is smaller than the sum of its proper divisors (1565631568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1120321520 is a wasteful number, since it uses less digits than its factorization.

1120321520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1120321520 is about 33471.2043404476. The cubic root of 1120321520 is about 1038.5981853092.

Adding to 1120321520 its reverse (251230211), we get a palindrome (1371551731).

It can be divided in two parts, 11203 and 21520, that added together give a palindrome (32723).

The spelling of 1120321520 in words is "one billion, one hundred twenty million, three hundred twenty-one thousand, five hundred twenty".